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Finding the Fourth Proportional to 442,866.76, 664,405.60 and 143,347.40

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Solution

The fourth proportional to 442,866.76, 664,405.60 and 143,347.40 is: 215,055.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,866.76 : 664,405.60 = 143,347.40 : x
  2. Step 2: Convert to fraction form
    442,866.76/664,405.60 = 143,347.40/x
  3. Step 3: Cross multiply
    442,866.76x = 664,405.60 × 143,347.40
  4. Step 4: Simplify right side
    442,866.76x = 95,240,815,305.44
  5. Step 5: Solve for x
    x = 95,240,815,305.44/442,866.76
  6. Step 6: Final answer
    x = 215,055.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.